• JS Algorithmic Efficiency Activity: Sum of Even Numbers
  • 🎯 Goal
  • 🧩 Instructions
  • 💡 Example

JS Algorithmic Efficiency Activity: Sum of Even Numbers

🎯 Goal

Write a function that takes an array of numbers and calculates the sum of all even numbers. After completing the function, analyze the time and memory complexity of your solution.

🧩 Instructions

• Complete the function sumEvenNumbers(arr) in the next code cell.
• Test it with arrays of different sizes.
• Think about:
• Time Complexity: How long it takes to compute as the array grows.
• Memory Complexity: How much extra memory your algorithm uses.
• Optional: Try to optimize memory usage if possible (e.g., avoid creating extra arrays).

💡 Example

// Input: [1,2,3,4,5] // Output: 6 (because 2 + 4 = 6)

// Starter Code to Build Off of:

// Task: Complete this function
function sumEvenNumbers(arr) {
  // Your code here
}

// Test your function
const testArray = [1, 2, 3, 4, 5];
console.log("Sum of even numbers:", sumEvenNumbers(testArray));

// Optional: test with larger arrays
const largeArray = Array.from({length: 10}, (_, i) => i + 1);
console.log("Sum of even numbers in large array:", sumEvenNumbers(largeArray));